It was with no little surprise that the news of the plight that was
said to have befallen Andy Foger was received by Tom and his
associates. The newspaper had quite an account of the affair, and,
even allowing the usual discount for the press dispatches, it looked
as if the former bully was in rather distressing circumstances.

"He won't have to be carried very far into Africa to be in a bad
country," said the old hunter. "Of course, some parts of the
continent are all right, and for me, I like it all, where there's
hunting to be had. But I guess your young friend Foger won't care
for it."

"He's no friend of ours." declared Ned, as Tom was reading the
newspaper account. "Still, I don't wish him any bad luck, and I do
hope he doesn't become the captive of the red pygmies."

"So do I," echoed the old hunter fervently. There was no news of
Andy in the papers the next day, though there were cable dispatches
speculating on what might have happened to him and the airship. In
Shopton the dispatches created no little comment, and it was said
that Mr. Foger was going to start for Africa at once to rescue his
son. This, however, could not he confirmed.

Meanwhile Tom and his friends were very busy over the Black Hawk.
Every hour saw the craft nearer completion, for the young inventor
had had much experience in this sort of work now, and knew just how
to proceed.

To Mr. Damon were intrusted certain things which he could well
attend to, and though he frequently stopped to bless his necktie or
his shoelaces, still he got along fairly well.

There would be no necessity of purchasing supplies in this country,
for they could get all they needed in the African city of Majumba,
on the western coast, where they planned to land. There the airship
would be put together, stocked with provisions and supplies, and
they would begin their journey inland. They planned to head for Buka
Meala, crossing the Congo River, and then go into the very interior
of the heart of the dark continent.

As we have described in detail, in the former books of this series,
the construction of Tom Swift's airship, the Red Cloud, and as the
Black Hawk was made in a similar manner to that, we will devote but
brief space to it now. As the story proceeds, and the need arises
for a description of certain features, we will give them to you, so
that you will have a clear idea of what a wonderful craft it was.

Sufficient to say that there was a gas bag, made of a light but
strong material, and capable of holding enough vapor, of a new and
secret composition, to lift the airship with its load. This was the
dirigible-balloon feature of the craft, and with the two powerful
propellers, fore and aft (in which particular the Black Hawk
differed from the Red Cloud which had two forward propellers);--with
these two powerful wooden screws, as we have said, the new ship
could travel swiftly without depending on the wing planes.

But as there is always a possibility of the gas bag being punctured,
or the vapor suddenly escaping from one cause or another, Tom did
not depend on this alone to keep his craft afloat. It was a perfect
aeroplane, and with the gas bag entirely empty could be sent
scudding along at any height desired. To enable it to rise by means
of the wings, however, it was necessary to start it in motion along
the ground, and for this purpose wheels were provided.

There was a large body or car to the craft, suspended from beneath
the gas bag, and in this car were the cabins, the living, sleeping
and eating apartments, the storerooms and the engine compartment.

This last was a marvel of skill, for it contained besides the gas
machine, and the motor for working the propellers, dynamos, gages,
and instruments for telling the speed and height, motors for doing
various pieces of work, levers, wheels, cogs, gears, tanks for
storing the lifting gas, and other features of interest.

There were several staterooms for the use of the young captain and
the passengers, an observation and steering tower, a living-room,
where they could all assemble as the ship was sailing through the
air, and a completely equipped kitchen.

This last was Mr. Damon's special pride, as he was a sort of cook,
and he liked nothing better than to get up a meal when the craft was
two or three miles high, and scudding along at seventy-five miles an
hour.

In addition there were to be taken along many scientific
instruments, weapons of defense and offense, in addition to the
electric rifle, and various other objects which will be spoken of in
due time.

"Well," remarked Tom Swift one afternoon, following a hard day's
work in the shop, "I think, if all goes well, and we have good
weather, I'll give the Black Hawk a trial tomorrow."

"There is no telling," was the answer of the young inventor. "These
things are more or less guesswork, even when you make two exactly
alike. As far as I can tell, we have now a better craft than the Red
Cloud was, but it remains to be seen how she will behave."

They worked late that night, putting the finishing touches on the
Black Hawk, and in the morning the new airship was wheeled out of
the shed, and placed on the level starting ground, ready for the
trial flight.

Only the bare machinery was in her, as yet, and the gas bag had not
been inflated as Tom wanted to try the plane feature first. But the
vapor machine was all ready to start generating the gas whenever it
was needed. Nor was the Black Hawk painted and decorated as she
would be when ready to be sent to Africa. On the whole, she looked
rather crude as she rested there on the bicycle wheels, awaiting the
starting of the big propellers. As the stores and supplies were not
yet in, Tom took aboard, in addition to Mr. Damon, Ned, his father,
Mr. Jackson and Mr. Durban, some bags of sand to represent the extra
weight that would have to be carried.

"If she'll rise with this load she'll do," announced the young
inventor, as he went carefully over the craft, looking to see that
everything was in shape.

"If she does rise it will be a new experience for me," spoke the old
elephant hunter. "I've never been in an airship before. It doesn't
seem possible that we can get up in the air with this machine."

"Maybe we won't," spoke Tom, who was always a little diffident about
a new piece of machinery.

"Well, if it doesn't do it the first time, it will the second, or
the fifty-second," declared Ned Newton. "Tom Swift doesn't give up
until he succeeds."

"Stop it! You'll make me blush!" cried the Black Hawk's owner as he
tried the different gages and levers to see that they were all
right.

After what seemed like a long time he gave the word for those who
were to make the trial trip to take their places. They did so, and
then, with Mr. Jackson, Tom went to the engine room. There was a
little delay, due to the fact that some adjustment was necessary on
the main motor. But at last it was fixed.

"All ready," answered Mr. Damon. The old elephant hunter sat in a
chair, nervously gripping the arms, and with a grim look on his
tanned face. Mr. Swift was cool, as Ned, for they had made many
trips in the air. Outside were Eradicate Sampson and Mrs. Baggert.

"Here we go!" suddenly cried Tom, and he yanked over the lever that
started the main motor and propellers. The Black Hawk trembled
throughout her entire length. She shivered and shook. Faster and
faster whirled the great wooden screws. The motor hummed and
throbbed.

Slowly the Black Hawk moved across the ground. Then she gathered
speed. Now she was fairly rushing over the level space. Tom Swift
tilted the elevation rudder, and with a suddenness that was
startling, at least to the old elephant hunter, the new airship shot
upward on a steep, slant.

"The Black Hawk flies!" yelled Ned Newton. "Now for elephant land
and the big tusks!"

"Yes, and perhaps for the red pygmies, too," added Tom in a low
voice. Then he gave his whole attention to the management of his new
machine, which was rapidly mounting upward, with a speed rivalling
that of his former big craft.